Amount of PVDF Used in a Lithium-ion "laptop" Battery

Submitted by benk on Sat, 04/02/2011 - 17:39

PVDF is polymer and acts as a binder that is mixed with the lithium storing active material and electron conducting carbon so that the mixture maintains good contact with all the components in a lithium-ion battery. Because of the the earthquake/tsunami in Japan, a major producer of PVDF (Kureha Corp with ~70% of production) is struggling and this has already begun to affect the battery supply for some Apple products.

This is a rough calculation of the amount of PVDF binder used in a lithium-ion "laptop" battery (ie. 18650 cell).

For a 2.4Ah battery with a cathode capacity of 180mAh/g and an anode capacity of 300mAh/g: